Merge pull request #151 from bvssvni/master

Replaced rustrt::trio::RtioFileStream with libc calls
Merge pull request #152 from bvssvni/master

Added manual close of file descriptor
Merge pull request #154 from bvssvni/master

Checking for error when opening file descriptor
Added link to how to contribute

See PistonDevelopers/piston#715
Updating to the latest nightly
Upgraded to latest Rust